.From the classroom window we saw a huge snake _____ the yard.
#97380
A
crossing
B
cross
C
across
D
having crossed
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  If he had helped you, he would have risked ________his job.
#88322
A
to lose
B
losing
C
to be lost
D
being lost
Though trying really hard, they acknowledged ____ at last.
#94691
A
defeated
B
defeating
C
having defeated
D
having been defeated
 All reference books ________, he didn't find the key to the question.
#88808
A
being searched
B
searched
C
to be searched
D
were searched