David said that it was because of his strong interest in literature＿＿he chose the course.
| A．that | B．what | C．why | D．how |
We’ve a lot of things to do. But _____ we must get some sleep.
| A．at first | B．at once | C．first of all | D．the first thing |
You will be late ______ you leave immediately.
| A．unless | B．until | C．if | D．or |
----- _______ in the workshop. Please stop it.
----- Sorry. I________.
| A．Smoking is not allowed, don’t know | B．Not smoking, an not sure |
| C．Don’t smoke, have no idea | D．Smoking is forbidden, didn’t know |
----- What happened in that new area?
----- New houses ______ recently over there.
| A．are built | B．build |
| C．have built | D．have been built |
What _____ their child fond of?
| A．do | B．does | C．are | D．is |