Traveling is a good way to           different cultures and broaden the mind.
#101052
A
expand
B
explore
C
expose
D
export
推荐题目
I have to see the doctor because I         a lot lately.
#102282
A
have been coughing
B
had coughed
C
coughed
D
cough
I won’t tell the student the answer to the math problem until he      on it for more than an hour.
#100166
A
has been working
B
will have worked
C
will have been working
D
had worked
—Will you go to the park now? —Not until I ________ my physics exercises. 
#104737
A
will finish
B
have finished
C
will have finished
D
had finished