_____ he referred to in his article was unknown to the general readers.
| A．That | B．What | C．Whether | D．Where |
It is usually warm in my hometown in March，but itbe rather cold sometimes.
| A．must | B．can | C．should | D．would |
Although thissound like a simple task，great care is needed.
| A．must | B．may | C．shall | D．should |
—What sort of house do you want to have? Something big?
—Well， itbe big—that’s not important.
| A．mustn’t | B．needn’t | C．can’t | D．won’t |
You don’t have to know the name of the author to find a book.Youfind the book by the title.
| A．must | B．need | C．can | D．would |
What a pity! Considering his ability and experience， hebetter.
need have done B.must have done C.can have done D.might have done