问题

Among the 15-year-old children, some ____ studying in university while others are still learning to read and write.

A:should have been
B: would have been
C: can be
D: must be

正确答案是：

同类题型

Two _______ students came to visit the museum.— The museum attracted people, especially students

______ beautiful music!

It’s more expensive to live in the city than to live in the countryside.— _________. Living in the city brings people more convenience, though.

When we stayed at the country house, we had onlyenough water for drinking. That’s why we didn’t take a fortwo days.A．bath

The sentence structure（结构）of “He often makes me happy” is ________.