His father looks young, but in fact he is ______. 
#51836
A
in the forties
B
in his forties
C
in the forty
D
in his forty
推荐题目
—Which number is next to sixteen?—________. 
#51632
A
Twenty
B
Fifteen
C
Thirty
D
Nineteen
The rainstorm killed __________ people at year.
#51386
A
two thousand
B
two thousands
C
two thousand of
D
two thousands of
Our new physics teacher got a pretty and lovely girl _____   . 
#51414
A
in his thirty
B
in his thirty’s
C
in his thirtieth
D
in his thirties
 It is said that the gravity on Mars is only about __________ of the gravity on earth.
#50894
A
three-eighths
B
third-eighth
C
three-eighth
D
third-eighth
About _________ people are in the People’s Park at the weekends.
#51800
A
two hundreds
B
two hundreds of
C
two hundred
D
hundred of