The book isn't intended for general readers probably because the author _______ too many scientific terms(术语) in it.
| A．wrote | B．employed | C．analyzed | D．introduced |
-- Who is dancing to music in the next room?
-- ________ the children.
| A．It is | B．They are | C．That is | D．There are |
Check your paper carefully to see ________ you have made any mistakes.
| A．what | B．which | C．whether | D．that |
It rained a lot during their journey, so they ________ have had a good time.
| A．must | B．can’t | C．shouldn’t | D．might |
People ________ with anyone who is always talking about how wonderful he is.
| A．fall in | B．keep company | C．catch up | D．get fed up |
-- Are you happy with this laboratory?
-- Not a little. We can’t have ________.
| A．a worse one | B．a nicer one | C．a worst one | D．a nicest one |