Lawrence Craven, a doctor from the USA, is the author of several published reports, one of _______ introduced the idea in 1953 _______ aspirin could reduce the risk of heart attacks.
Bears ________ fat stores throughout the summer and fall to have energy enough to last them through their winter sleep. (2013·浙江,17)
A good listener takes part in the conversation,________ ideas and raising questions to keep the talk flowing. (2013·浙江,12)
When the group discussion is nearing its end,make sure to ________ it with important points. (2013·浙江,9)
I had hoped to take a holiday this year but I wasn’t able to________. (2013·天津,8)
If you are in trouble,Mike is always willing to________a hand. (2013·天津,2)