Of all the subjects,I like _________ history best because it gives us_________useful knowledge of things in the past.
| A．the;a | B．/;a | C．a;the | D．a;/ |
Beyond the lake _____ quantities of birds coming from the North every winter.
| A．flies | B．flying | C．flied | D．fly |
Referring to reading, we must have the patience to read ______ book so that we will have _______ deep understanding of it.
| A．the; the | B．a; a | C．the; a | D．a; / |
The weight of the moon is only about _____ of that of the earth.
| A．one eighty | B．one of eighty | C．one the eightieth | D．one eightieth |
My partner wants to keep the company small _____ I’d like to expand it.
| A．and | B．or | C．however | D．while |
When and where this took place _____ still unknown.
| A．is | B．has | C．were | D．are |