Our math teacher ______ in our school for 20 years and he _____ here when he was 23 years old.
#42131
A
has taught, has come
B
taught, comes
C
taught, came
D
has taught, came
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There are some trees near our school. They ________ last Monday. 
#37017
A
water
B
watered
C
have watered
D
were watered
---How are you going to the park tomorrow?   ---I ________there. 
#40628
A
am by bike
B
ride my bike
C
am riding a bike
D
go on bike