Bats are surprisingly long-lived creatures, some _______ a life span of around 20 years.
#88688
A
had
B
having
C
have
D
to have
推荐题目
The teacher said he needed _____ boys besides his students _____ the classroom. 
#97946
A
20 other; clean  
B
20 more; to clean
C
20 more; cleaning
D
another 20; clean
He is said _______ his novel a year ago, but I don’t know why it hasn’t come out.
#94425
A
to finish
B
to have finished
C
to be finished
D
to have been finished