【2015·福建】_________the students came from different countries, they got along quite well in the summer camp.
| A．While | B．Unless | C．Since | D．Until |
— Has your mother finished her paper yet?
— I don’t know; she _______ it this morning.
| A．wrote | B．has written | C．had written | D．was writing |
Every morning, week in, week out, from dawn to dusk , he ______ his place on the bend.
| A．makes up | B．picks up | C．takes up | D．turns up |
It was in 1990 ______ the medicine was tested on human patients.
| A．since | B．that | C．before | D．when |
I didn’t pass the oral test, so I am not _____ the mood to tell jokes.
| A．in | B．over | C．at | D．on |
— Jane and Joan have been friends for fifty years.
— No wonder they have such a lot in ______.
| A．ordinary | B．average | C．common | D．normal |