It sounds like something is wrong with the car’s engine. ______ , we’d better take it to the garage immediately.
#82335
A
Otherwise
B
If not
C
If possible
D
If so
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Only through a lot of practice           such skills and experience. 
#81936
A
you can gain
B
can you gain
C
you gain
D
gain you
____ in a branch of the tree ___ a note which read "I'll meet you at the School Gate".
#80881
A
Sticking; was there
B
Stick; was there
C
To stick; was
D
Stuck; was
Not until the train pulled into the station          that his suitcase was gone.
#80626
A
did he find
B
had he found
C
he had found
D
he found