Among the 15-year-old children, some        studying in university while others are still learning to read and write.
#87787
A
should have been
B
would have been
C
can be
D
must be
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Water ____ be changed into vapour but it ____ be heated to its boiling point . 
#89755
A
may ; can
B
can ; must
C
may ; needn''t
D
must ; may
— ______ you finish your essay in time?— I am afraid ______.
#88134
A
Can; can’t
B
May; not
C
Must; needn’t
D
Can; not
-He looks very hot and dry.  -So______if you had a temperature of 40℃.
#90413
A
would you   
B
will you
C
would have you been   
D
do you