We must do everything we can _________ our earth clearer and safer.
#49701
A
made
B
to making
C
make
D
to make
推荐题目
We should study the new traffic rules and 1earn how___________ ourselves．
#49689
A
protect
B
to protect
C
protecting
D
protected
----What about ____________ this afternoon? ----Sounds great. Let’s go __________ and buy some water first.
#50206
A
playing tennis; to shop
B
play tennis; to shop
C
playing tennis; shopping
D
play tennis; shopping
— Good morning. Can I help you?— I’d like to have this package .
#49369
A
to weigh
B
to be weighed
C
weigh
D
weighed