______ the past year as an exchange student in Hong Kong, Linda appears more mature than those of her age.
A. Spending
B. Spent
C. Having spent
D. To spend
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I feel upset, for there are so many troublesome problems_______.
A. remaining to settle
B. remained to settle
C. remaining to be settled
D. remained to be settled
We are happy everything will go smoothly as _______.
A. to be planned
B. planned
C. being planned
D. having planned
_______ to miss the plane, he got to the airport an hour earlier.
A. Not to want
B. To want
C. Not wanting
D. Wanting
When I was away from home last week, John completely forgot _______ the plants as he promised to do.
A. watering
B. to water
C. that he watered
D. that he is to water