When trees are cut down, there is nothing to hold the soil         on the hillside. 
#68118
A
take place
B
out of place
C
in place
D
in place of
推荐题目
Healthy diet should ________ some nutrition (营养素), ________ sugar, protein and calcium.
#79064
A
contain; included
B
containing; including
C
be contained; included
D
contain; including
We ______ for one hour and a half and it is about time we ______ a rest.
#72501
A
trained; take
B
have trained; took
C
are training; will take
D
had trained; to take