问题

adam Curie did the science experimentagain, she was more careful where she_____ a mistake.

A:made
B:has made
C:was making
D:had made

正确答案是：

同类题型

We should always keep the classroom ________ and tidy.

d_________the Belt meets the Road,Jiangsu will contribute more to the Belt and Road construction.

If you had brought your swimming suit with you, we ___________ swimming in the lake now.

The boy is looking forward toagood time after the exam.

his may sound like a simple process,great care is needed．