Give them a hand this time and I am sure they will offer theirs ______ in the future.
| A．by turns | B．in turn |
| C．at turn | D．in return |
Always read theon the bottle carefully and take the right amount of medicine.
| A．explanations | B．instructions | C．descriptions | D．Introductions |
—I’m not finished with my dinner yet.
—But our friendsfor us.
| A．will wait | B．wait | C．have waited | D．are waiting |
—How long _____ he ______ in the USA?
—Three years. But he never regrets coming back to China.
| A．did;live | B．has;lived | C．does;live | D．will;live |
—Would you like tothe discussion this Saturday?
—Sorry, I have an important meeting to.
| A．attend; join | B．join; attend |
| C．join; take part in | D．join in; attend |
This is the first time that Iface to face with the president.
| A．had come | B．have come | C．came | D．come |