After walking on the zigzag path to the mountain top for a few hours, the tourists gathered under trees ________ shade and ________ down to have a rest.
| A．provided; sit | B．providing; sitting |
| C．providing; sat | D．provided; sat |
It's no such ____ long distance from here to ____ supermarket. We can walk there.
| A．a; the | B．the; a | C．/; the | D．/; a |
The quality of the teachers will influence the students,and ________, the quality of the students will influence the teachers.
| A．as a result | B．in vain | C．in turn | D．in time |
That was the last time I saw my father before he _____.
| A．pass on | B．pass away | C．pass off | D．pass down |
The experiment __to be .
| A．turned out; greatly success | B．turned out; a great success |
| C．turned out; greatly successful | D．turned up; great success |
Many _______ of years later, the first extremely small plants began to appear on the surface of the water.
| A．millions | B．million | C．million of | D．millions of |