Life will be destroyed ____ all our sources
a. as long as b. unless c. if d. whether
____ we can find new sources of energy,our life come to an end
a. unless b. when c. if d. b or c
_____ you phone me when you come to England?
a. do b. have c. will d. would
Unless we hurry,we’ll ____ the bus
a. miss b. remember c. catch d. get in
If you stay up late the previous night,you _____ sleepy the next morning a. feel b. t feel c. feels d. will feel
Will you go to see the doctor if you ______ a headache?
a. has b. will have c. having d. have
Unless you _____ smoking your health won’t get worse
a. continue b. continued c. are continuing d. will continue
He won’t speak English ______ he goes to England
a. when b. if c. unless d. which
If you're not carefully,you will ______ it
a. spoiling b. spoil c. be spoiled d. to spoil
If Mrs Laura Taylor _______ 5 years younger,she would walk round
a. was b. is c. had been d. were
If you ______ hard,you will pass the exam
a. study b. studied c. will study d. would study
He will not learn much ______ he work harder
a. if b. unless c. as d. because
If I were him I ______ smoking
a. will stop b. stopped c. would stop d. shall stop
If he ______ early,he’d get to work on time
a. got up b. gets up c. get up d. has got up
_______you _______your dinner if your mother was will?
a. will …cook b. will cook c. would cook d. would … cook
I’d tell you if I ______ the answer
a. know b. knows c. knew d. will have known
If we had more time,we _____ for a picnic
a. will go b. would go c. went d. will have gone
What ______you ______ if your father gave you $200?
A. will …buy b. will buy c. would … buy d. would buy
If you _______ ,you be late
a. not hurry b. won’t hurry c. doesn’t hurry d. don’t hurry
rewrite the following sentences using " unless"
1. our sources of energy will soon if others are not found
Unless others are found, our sources of energy will soon
2. Life on earth will be destroy if nuclear tests do not stop
Unless nuclear tests stops, Life on earth will be destroy
3. men will continue to live on food if other types of protein are not found
Unless other types of protein are found, men will continue to live on food
4. World population will countinue to rise if we do not try reduce it
Unless we try to reduce it, World population will countinue to rise
5. aLL OUR beautiful forests will be destoyed if we do nothing to preserve them
Unless we do something to preserve them, aLL OUR beautiful forests will be destoyed
6. Unless it stops raining, we won't go out
if it doesn't stop raining, we won't go out
7. Without gravity, water couldn't run down hill
Water couldn't run down hill unless there were not gravity