--- Did you find your book last night?
--- Yes, I finally managed __________ the book I was looking for.
| A．to find | B．finding | C．to found | D．founding |
______ is known to all，the Amber Room belongs to the Russians.
| A．As | B．Which | C．It | D．What |
_____ these experiments were successfully completed would we think of
going into humans.
| A．If only | B．So that | C．Only if | D．Even if |
According to the rules and regulations, all payments _____ be made in cash in the shopping center.
| A．shall | B．can | C．must | D．should |
A huge amount of environmental damage has been _____ by the destruction of the rainforests.
| A．brought up | B．brought about | C．brought down | D．brought out |
_____ her leg the last time, Brenda decided not to go on the school skiing trip this year.
| A．Breaking | B．Broken | C．To break | D．Having broken |