I ___ my letter with a visit.
A. followed
B. followed on
C. followed through
D. followed up
To some extent , smoking is ____ to lung cancer.
A. in relation
B. has nothing to do
C. connected
D. contacted
They have made great ____ to the relief funds.
A. contributions
B. help
C. aids
D. money
He is a new comer, so he is nor so familiar ___ the work.
A. to
B. with
C. at
D. on
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