______ his return from Europe , he set to work on the project..
#25987
A
As
B
At
C
Upon
D
For
推荐题目
All efforts of cloning an animal will be ________ if there is not enough diversity in the group to overcome illness.
#26496
A
in need
B
in place
C
in vain
D
in case
We set off _______ the Three Gorges _______ a beautiful afternoon from Fu Ling.
#25925
A
to; at
B
from; on
C
through; on
D
for; on
The composition is well written ___________ a few spelling mistakes．
#26504
A
beside
B
besides
C
except
D
except for