题目

Tom has managed to pursue his diverse interests___________ his fast-moving career.A.in defence of B.in relation to C.in parallel with D.in charge of 答案：【答案】C【解析】考查词组。句意：汤姆在追求自己的多元化兴趣的同时，也在追求自己快速发展的事业。A. in defence of保护。为------辩护；B. in relation to关于，涉及；C. in parallel with与------同时；D. in charge of负责，主管。根据pursue his diverse interests和 his fast-moving career可知，此处指兴趣与事业同时进行。探究：22﹣21=2×21﹣1×21=2(　　)　23﹣22=　　　　=2(　　)，　24﹣23=　　　　=2(　　)，……（1）请仔细观察，写出第4个等式；（2）请你找规律，写出第n个等式；（3）计算：21+22+23+…+22019﹣22020．