----- Have you heard of Earth Day ?----Yes . The first Earth Day ______ in 1970 to educate us to protect our planet .
#39398
A
celebrates
B
celebrated
C
is celebrated
D
was celebrated
推荐题目
—____ my pen?—Yes, I ___ it on your desk five minutes ago.
#40053
A
Have you seen; saw
B
Did you see; have seen
C
Will you see; am seeing
D
Do you see; will see
Students in Beijing _____away many books to the Hope Schools since 2009.
#42417
A
have given
B
give
C
will give
D
gave
Hurry up! Once the concert starts, nobody _______ to enter the concert hall.
#36280
A
allows
B
allowed
C
is allowed
D
is allowing