As well as costing the Middle East dearly in terms of human life, conflict! (冲突) _______ the region around $ 12 trillion since 1991, according to a report by the Strategic Foresight Group.
| A．is also cost | B．had also cost | C．will also cost | D．has also cost |
It depends on _______ he has enough money.
| A．if | B．weather | C．if or not | D．whether |
______ gets homes first is to cook the supper.
| A．Who | B．Whom | C．Those who | D．Whoever |
______ Wang Feng looked after the old woman a whole year moved us all.
| A．That | B．What | C．When | D．Why |
The monitor suggested that we ______ for a picnic on Sunday.
| A．went | B．must go | C．could go | D．go |
He always thinks of _______ he can do more for the people.
| A．what | B．how | C．if | D．whatever |