This sound doesn't ______ in Chinese, so it's difficult for the students to pronounce.
A.happen
B.occur
C.come about
D.take place
It is difficult ______a world record and even more difficult to ______it.
A. keeping, set
B. keep, set
C. set, keep
D. to set, keep
It is only in the most difficult circumstances ______ a man's abilities are fully tested.
A.when
B.that
C.where
D.so that
A.I am a little sad.
B.It doesn't matter.
C.It's been a difficult day.
一You seem a little blue today. What’s the matter?
-___________.
A.I am a little sad.
B.It doesn ’t matter.
C.It’s been a difficult day.
It's a______ difficult exam, but we could still cope with it.
A.fairly
B.too
C.rather
D.enough
It's always difficult to be in a foreign country,______if you don't speak the language.
A.extremely
B.naturally
C.basically
D.especially
It's really a difficult problem to ______.
A.look at
B.make out
C.deal with
D.dwell on
Tom is the man who always does ______ best even in the most difficult situation.
A.one's
B.your
C.their
D.his
That sound doesn’t _____ in his language so it’s difficult for him to pronounce.
[A] happen
[B] take place
[C] occur
[D] run