We all feel it is Jack as well as his wife that ________ for their son's bad performance at school.
| A．are to blame | B．is to be blamed |
| C．are to be blamed | D．is to blame |
John’s success has nothing to do with good luck. It is years of hard work _____ has made him what he is today.
| A．why | B．when | C．which | D．that |
We were about to go out for a walk ________ it began to rain.
| A．while | B．before | C．as | D．when |
_____ you’ve got a chance, you had better make full use of it.
| A．Now that | B．After | C．Although | D．As soon as |
Sam _____ some knowledge of the computer just by watching others working on it.
| A．brought up | B．looked up | C．picked up | D．set up |
Children who are not active or diet is rich in fat will gain weight quickly.
| A．what | B．whose | C．which | D．that |