This means that for the first time doctors may be able to tell if an infected(被感染的)person who feels well is ________ becoming ill, so that they can try to do something to prevent this.
#26360
A
in case of
B
in danger of
C
in terms of
D
in charge of
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Mr. Smith likes traveling _______; but his wife enjoys _______. 
#26662
A
by train; taking a taxi
B
on train; by taxi
C
by train; by taxi
D
on train; taking a taxi
He goes to work every day ______.
#25825
A
except for rainy days
B
besides it rains
C
but that it rains
D
except on rainy days