difficulties we’ll meet,we must finish the work in time.
| A．However | B．Whatever |
| C．Whichever | D．Wherever |
Life isn’t meant to be easy and you have to _______ some pain to 1earn the skills to move forward.
| A．get across | B．go over | C．get into | D．go through |
One can’t do extreme sports _________ he or she has had some training.
| A．if | B．unless | C．once | D．since |
--David, are you 1istening to me?
--Sorry, Dad. I _______ to make sense of what the reporter said.
| A．was trying | B．have tried | C．am trying | D．tried |
The road construction is based on the agreement, one of _______ purposes is to ensure its completion on time.
| A．which | B．whose | C．that | D．what |
Many approaches have been _______ to control the spread of H7N9 Bird Flu.
| A．adapted | B．employed | C．negotiated | D．accessed |