I would have helped you, but I ________ really occupied the whole week．
| A．was | B．am | C．had been | D．were |
The boy burst into tears ________ he saw his mother.
| A．at the moment | B．in a moment | C．for a moment | D．the moment |
________, I could not memorize the text.
| A．However hard did I try | B．However hard I tried |
| C．However I tried hard | D．However I had tried hard |
Raising environmental awareness was the aim of our art exhibition ____ last week.
| A．to hold | B．held | C．having held | D．being held |
_________ he was, he still went on with his work.
| A．Tired although | B．Tiring as | C．Tired though | D．While tired |
It was the training ________ he had as a young man ________ made him so excellent.
| A．what; that | B．that; which | C．that; what | D．which; that |