－Have you known Dr Jackson for a long time?－Yes，since she the Chinese Society．
#102003
A
has joined
B
joins
C
had joined
D
joined
推荐题目
In the past decades, sea ice ______ in the Arctic as a result of global warming.
#100763
A
had melted
B
has been melting
C
melted
D
is melting
Climbing Mount Tai great skills and not without risk.
#102025
A
requires; is
B
required; was
C
required; are
D
required; were
He_____ articles for our wall-newspaper these years, and he____ about thirty articles.
#101162
A
has written; wrote
B
has been writing; wrote
C
is writing; has been writing
D
has been writing; has written
Oh，my God! The ceiling in and the kitchen is flooded. Come quickly，Jack!
#99349
A
fell
B
had fallen
C
has fallen
D
was falling
Because it was hard to _____ with the money he got paid, he wanted to take ____ job.
#102781
A
make his life; a second
B
make ends meet; a second
C
earn his living; the second
D
make his living; the second