—Did you find the missing couple in the mountain yesterday?—No, but we ________ to get in touch with them ever since. 
#104758
A
have tried
B
have been trying
C
had tried
D
had been trying
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His uncle went abroad in 2010, and _______since.
#101894
A
has not been heard of
B
had not been heard of
C
had not heard of
D
has not heard of
Much to my anger, the camera I         didn’t work again.
#101148
A
repaired
B
had repaired
C
had had repaired
D
was repaired
She was surprised to find the fridge empty; the child _____ everything!
#102652
A
had been eating
B
had eaten
C
have eaten
D
have been eating