In a sports team each player has a clear role，and there are few occasions members are confused or uncertain of their roles．
| A．which | B．that | C．when | D．how |
-Dr. Jackson is not in his office at the moment.
-All right. Ihim later.
| A． |
will call |
B． |
have called |
C． |
call |
D． |
will be calling |
—Can’t you stay a little longer?
—It’s getting late. I really _____go now, My daughter is home alone.
| A．may | B．can | C．must | D．dare |
You won't find paper cutting difficultyou keep practicing it.
| A． | even if | B． | as long as | C． | as if | D． | ever since |
—Did you have difficulty finding Ann'house?
—Not really.She___us clear directions and we were able to find it.easily?
| A．was to give | B．had given |
| C．was giving | D．would give |
In the last few years,China ___ great achievements in environmental protection.
| A．has made | B．had made | C．was making | D．is making |