I think _______ is really difficult for us to work out this kind of math problem.
| A．it | B．this | C．that | D．one |
Police have foundappears to be the lost ancient statue。
| A．which | B．where | C．how | D．what |
Tony can hardly boil an egg，stillcook dinner.
| A．less | B．little | C．much | D．more |
If wenow to protect the environment, we’ll live to regret it.
| A．hadn't acted | B．haven't acted | C．don't act | D．won't act |
Try not to cough more than you cansince it may cause problems to your lungs.
A. check B. allow C. stop. help
They might just have a place ______on the writing course一why don't you give it a try?
| A．leaves | B．left | C．leaving | D．to leave |