Experts warn that global warming will cause climate changes, including more ______ floods, heat waves and droughts.
| A．frequent | B．usual | C．ordinary | D．common |
—Look! Somebodythe sofa.
—Well, it wasn’t me. I didn’t do it.
| A．is cleaning | B．has cleaned | C．was cleaning | D．had cleaned |
—Are you ready for Spain?
—Yes, I want the girls to experience that they’re young.
| A．before | B．until | C．while | D．since |
I was told that there were about 50 foreign students Chinese in the school, and most were from Germany.
| A．who were studying ; of whom | B．who study; of them |
| C．studying; of them | D．study; of whom |
We haven’t settled the question of it is necessary for him to study abroad.
| A．what | B．whether | C．that | D．where |
—Excuse me, I wonder if you can help me.
—Sure, ?
| A．what is it | B．what is this | C．what help | D．what do you want |