His father served in the army in ________ when he was in ________.
#51731
A
the 1950s; his twenties
B
1950s; twenties
C
1950’s, the twentieth
D
the 1950s; the twentieth
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There were different kinds of dinosaurs in the word in the past.
#51715
A
hundred of
B
two hundred of
C
hundreds of
D
two hundreds of
They have stayed in Beijing for ________________.
#51576
A
one and half an hour
B
one and a half
C
one year and a half
D
one and a half hour