—Who helped Li Lei with his English? — , he learnt it by himself.
| A．Anybody | B．Somebody |
| C．Nobody | D．Everybody |
The shoes were worn out, what’s more, they aren’t worth _____.
| A．to mend | B．mending | C．mended | D．for mending |
— What's the population ____ the U.S.A?
— The U.S.A has ____ population of 297 million.
| A．of…a | B．of… /, | C．in…a | D．in … some |
We should plant more trees on ____ sides of the street.
| A．either | B．both | C．all | D．each |
---What are you going to do next weekend?
---I _____ yet. Do you have any good ideas?
| A．haven't decided | B．won't decide |
| C．have decided | D．didn't decide |
About 75% percent of the students can go swimming ____the rest can't.
| A．while | B．and | C．so | D．or |