The students clearly kept informed of what to prepare during the summer holidays will not buy many irrelevant books ______.
| A．blindly | B．specially |
| C．practically | D．completely |
So many directors _________,the board meeting had to be put off.
| A．were absent | B．been absent | C．had been absent | D．being absent |
The grain output is 8 percent higher this year than _______ of last year.
| A．that | B．the one | C．one | D．those |
His luggage includes two large cases which ________ as much as 50kg.
| A．weighs | B．is weighed | C．weigh | D．are weighed |
-Why didn’t you go to the party ?
_______ an invitation, I would have gone to the party .
| A．Had I received | B．If I received |
| C．If I should receive | D．Were I to receive |
_______ I admit that the problems are difficult , I don’t agree that they can’t be solved .
| A．In case | B．As | C．Because | D．While |