Polar explorers have to be extremely _____ to bear the climate and other hardships. 
#19722
A
tough
B
rough
C
difficult
D
brave
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After the long journey, the Whites returned home, ___________.
#19226
A
safely but tired
B
safe but tired
C
safe and tiring
D
safely and tiring
-----How did you think of the job he did last week ?-----Well done. ______. 
#59567
A
It couldn’t be worse
B
It should be better
C
It couldn’t have been better
D
It was worse
Alice laid her baby on the sofa_____ and wrapped it with a blanket.
#20431
A
silently
B
tenderly
C
friendly
D
comfortably
The twins has studied in this school  ________    .
#34898
A
two years ago
B
since two years ago
C
for two yeas ago
D
since two years