Astronaut Zhai Zhigang has become the first Chinese_____in space.
#97080
A
walking
B
walked
C
to have walked
D
to walk
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Everyone here will thank the firefighters for the things they did to prevent fires ________the environment safer.
#89772
A
to make
B
make
C
making
D
from making
He managed to make himself____with his___English.
#91589
A
Understand; breaking
B
understand, broken
C
understood, breaking
D
understood, broken
_________ into a famous university made his parents very happy.
#96342
A
Tom was admitted
B
Tom be admitted
C
If Tom was admitted
D
Tom’s being admitted