1. Điền vào chỗ trống sử dụng các thì đã học (HTĐ, QKĐ, HTHT, HTTD, QKTD, TLĐ, TLTD, TLHTTD)
1.1. In all the world, there (be).............................only 14 mountains that (reach).............................above 8,000 meters.
1.2. He sometimes (come).............................to see his parents.
1.3. When I (come)............................., she (leave).............................for Dalat ten minutes ago.
1.4. My grandfather never (fly).............................in an airplane, and he has no intention of ever doing so.
1.5. I knew that this road (be).............................too narrow.
1.1. In all the world, there (be)............are.................only 14 mountains that (reach)...............reach..............above 8,000 meters.
1.2. He sometimes (come).......comes......................to see his parents.
1.3. When I (come)................. came,............, she (leave)............ had left.................for Dalat ten minutes ago.
1.4. My grandfather never (fly).......has never flown ......................in an airplane, and he has no intention of ever doing so.
1.5. I knew that this road (be).............. was...............too narrow.