With a lot of difficult problems ______, the newly-elected president is having a hard time.
#4661
A
settled
B
settling
C
to settle
D
being settled
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Go and see her whenever _____. 
#4729
A
it will be convenient to you
B
you will be convenient
C
it is convenient to you
D
you are convenient
.If _____,the experiment will be successful.
#4718
A
carefully doing
B
it done carefully
C
carefully done
D
doing carefully
—We weren’t sure which way to go. In the end we turned right.—You _____ the wrong way. You _____ left.
#4836
A
went; should have turned
B
have gone; must turn
C
went; would have turned
D
had gone; must have turned