1 . The reason ________ he explained at the meeting for his absence didn’t make sense. (用适当的词填空)

2 . However, this was a time ________ one had got to have a passbook to live in Johannesburg. (用适当的词填空)

3 . Two of the authors of the review also made a study published in 2014 ________ showed a mere five to 10 minutes a day of running reduced the risk of heart disease and early deaths from all causes.5. Like anything, it is possible to have too much of both, ________ is not good for the health. (用适当的词填空)

4 . The 80,000 objects collected by Sir Hans Sloane, formed the core collection of the British Museum________opened in 1759. (用适当的词填空)

6 . Donald survived when the car ________ he was in crashed into a truck from the opposite side.

A．as

B．where

C．that

D．once

7 . Mary’s success lies in the fact ________ she is co-operative and eager to learn from others.

A．because

B．which

C．where

D．that

10 . This is the first thing _____ we must do in order to learn English well. (用适当的词填空)