_______ travelling expenses rising a lot, we had to change all our plans for the tour．
| A．As | B．By | C．Since | D．With |
The students were all standing by the swimming pool, ______ swimming suits.
| A．all of them worn | B．all were wearing | C．all of whom wearing | D．all wearing |
All of us have already known ____ she will choose is the opportunity to go abroad.
| A．this | B．what | C．which | D．that |
— Did you have a wonderful time at the ball last night?
— ____ ! I’ve never had a more wonderful time all my life.
| A．You bet | B．No problem | C．Don’t mention it | D．Not really |
This machine is very easy______. Anybody can learn to use it in a few minutes.
| A．operating | B．to be operating | C．operated | D．to operate |
Don’t blame the worker. He just carried out the order______.
| A．as told | B．as are told | C．as telling | D．as they told |