问题

It’s reported that scientists have________ an effective way to deal with H1N1–Really That’s great!

A:enthusiastic
B:has been working
C:worked
D:secure

正确答案是：

同类题型

We ask the students to at 9: 30 in the evening.

1You must ______ yourcigarette when you are at the gas station.

five professional hands ______ them next month, these students are sure to complete the experiment on time.

Tom, you _____ leave your clothes on the floor like this! [ ]

I admired my classmate Lisa very much_____ her prettiness, she was smart and helpful