I usually sleep with the window open ________ it is really cold.
A. ifB. unlessC. now thatD. in case
In big cities, young people often go to cafés ________ with friends.
A. relaxedB. relaxC. to relaxD. relaxing
Social media, like WeChat, ________ the way of communication nowadays.
A. are changingB. change
C. changedD. were changing
Li Hua’s parents hold different opinions on whether they should have ________ child.
A. anotherB. otherC. othersD. the other
Yesterday I went back to my primary school, ________ my teachers and I recalled our good old days.
A. whichB. thatC. whenD. where
________ as a volunteer teacher in Tibet for a year, Linda has become more experienced.
A. To workB. WorkingC. Having workedD. Worked
