I like sleeping with the window open ______ it’s too cold.
| A．if | B．when |
C．until | D．unless |
Please _____ who broke the window.
| A．find out | B．find | C．look for | D．look out |
I enjoy learning English, it takes me a lot of time.
| A．as if | B．though | C．because | D．for |
There used a tree in front of the house, but now it is cut down.
| A．be | B．have | C．to be | D．to have |
I the camera for a week already.
| A．bought | B．have bought | C．borrow | D．have kept |
You have never visited the place before, you?
| A．did | B．didn’t | C．have | D．haven’t |