We entered the café and sat down by the window, waiting ________.
#88823
A
to serve
B
to be served
C
serving
D
served
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One learns a language by making mistakes and _______ them.
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A
correct
B
correcting
C
corrects
D
to correct
_______________ while writing, he locked himself in his study.
#94156
A
Not to interrupt
B
Not being interrupted
C
Not to be interrupted
D
Being not interrupted
_____, your composition is full of mistakes.
#95713
A
Writing carelessly
B
Written carelessly
C
Having written carelessly
D
Being written carelessly
The time and effort he has devoted during the past few years ______ trees in that remote area is now considered to be of great value.
#95651
A
plant
B
planting
C
to plant
D
to planting