Alex has been in China for quite a few years. ________, he speaks fluent Chinese.
#11137
A
Especially
B
Frequently
C
Surprisingly
D
Consequently
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—How did she get infected?  —She _______ the viruses without any protection.
#12814
A
exposed to
B
had exposed to
C
was exposed to
D
been exposed to
Kate is only a nodding ______, not very familiar to me. 
#12847
A
acquaintance
B
partner
C
companion
D
coincidence