问题

With a lot of difficult problems_________, they are working hard day and night!

A:settling
B:to settle
C:being settled
D:settled

正确答案是：

同类题型

How many students are there in yourclass___________–Forty-five.

These postcards are ________.

Little Tina can draw_____,her drawings are very_____.

To reach Africa, we flew high mountains, deep valleys and great deserts(沙漠)

When did you ______ — ______ the morning of November20th. arrive, On D