The little boy is dirty from head to foot because he ________ in the mud all morning.
#104514
A
has played
B
is playing
C
has been playing
D
was playing
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The theory he had stuck _______ to be true.
#104225
A
proved
B
to proving
C
to prove
D
to proved
The price of the radio ____ , and I don’t know the reason. 
#103927
A
went up
B
has gone up
C
had gone up
D
will go up
 As I ________ the next day, I ________ to bed early that evening. 
#104469
A
left; went
B
am leaving; go
C
was to leave; went
D
had left; went