Warmblooded animals live an active life even in freezing winter，which helps them to ________ their normal body temperature.
#73122
A
keep up
B
build up
C
bring up
D
pick up
推荐题目
The teacher said that light ___ faster than sound.
#80957
A
travelled
B
had travelled
C
travels
D
were travelling
His co-workers ______ him though he himself didn’t think he had done anything special.
#81529
A
thought highly of
B
looked up to
C
sing high praise of
D
show great respect for
The writer her children so that she could concentrate on her writing, because they are too noisy．
#72238
A
sent out
B
sent for
C
send up
D
send away