问题

Why do you look so upset—There are so many troublesome problems _____.

A:remaining tobe settled
B:remainedsettled
C:remaining tosettle
D:remained tobe settled

正确答案是：

同类题型

If you had enough money, what _____? [ ]

What’s the matter– I have a ________ . I have to go to the doctor.

Your pen is very nice.—________________.

The church tower whichwillbe open to tourists soon. The work is almost finished.

has been trying to bring its nuclearcrisis under ____ control, but ____ spread of radiation has raised concernsabout the safety of the nuclear energy