You __________ buy a gift, but you can if you want to.
| A．must | B．mustn’t | C．have to | D．don’t have to |
241. I am leaving in an hour but I haven’t _____ my clothes into my trunk.
| A．paced | B．packed | C．sent | D．Carried |
240. It is an important problem. You should ________ before you draw a conclusion.
| A．think about | B．think it over | C．think of it | D．think over it |
239. He_____ me 50 yuan and didn’t return it to me until last night.
| A．owed | B．lent | C．paid | D．Borrowed |
238. --- Ought he to get down to his work at once?
--- Yes, he _____.
ought B. ought to C. must D. should to
237. Our teacher will _____ our class a picnic at the riverside tomorrow if the weather permits.
| A．organize | B．order | C．arrange | D．Operate |