Bats are surprisingly long-lived creatures, some ___ a life span of around 20 years. 
#94661
A
have
B
had
C
having
D
to have
推荐题目
You can’t imagine what great trouble they have _________ the problem_______.
#95579
A
to solve; being talked about
B
solving; discussing
C
to solve; to talk about
D
solving; being discussed
--- Shall we call on Frank tonight?---We’d better not. He is said ________ a lecture.
#97302
A
preparing
B
to be preparing
C
to have prepared
D
having prepared