You _____ read a book in the sun—it'll do harm to your eyes．
| A．couldn't | B．wouldn't | C．needn't | D．mustn't |
If people eat natural poisons by mistake, they _____ go to hospital without delay．
| A．would | B．can | C．may | D．must |
Jack is not very decisive, and he always finds himself in a ________ as if he doesn’t know what he really wants to do．
| A．fantasy | B．dilemma | C．contradiction | D．conflict |
We had to walk home that night, tired , on account of , to our disappointment, __________．
| A．there not being buses | B．there not having buses |
| C．there were no buses | D．there had no buses |
—Thank you for your coffee．
—But you________ it．
| A．didn’t drink | B．aren’t drinking |
| C．don’t drink | D．hadn’t drunk |
Lily seems to know a lot about Hong Kong, but she has never been there．
| A．typically | B．normally | C．actually | D．naturally |