A.can use
B. can be used
C.is to use
D. is using
第1题:
A.was first found
B.was first discovered
C.has first been discovered
D.was seen first
第2题:
第3题:
哪些单词的重音在第一个音节?
A.family
B.Explain
C.culture
D.produce
第4题:
Which of the following has the largest demand for water?( )
[A] Agriculture.
[B] Industry.
[C] Offices.
[D] Family life.
第5题:
Electricity () by the Greeks a good many years ago.
Awas first found
Bwas first discovered
Chas first been discovered
Dwas seen first