1. It is important to remember that success ________ a sum of small efforts made each day and often ________ years of achieve.
A. is; takes B. are; takes C. are; take D. is; take
2.—Where is Peter? I can't find him anywhere.
—He went to the library after breakfast and ________ his essay there ever since.
A. wrote B. had written C. has been writing D. is writing
3.In the last few years, China ________ great achievements in environmental protection.
A. has made B. had made C. was making D. is making
4.Some experts think reading is the fundamental skill upon ________ school education depends.
A. It B. that C. whose D. which
【解析】 由“went to library“用过去时，ever since“从那时起”，可知“写”的动作是从过去一个时间道现在为止一直在进行，故选现在完成进行时，即C符合题意。
【解析】in the last/past few years“在过去的数年间”，为现在完成时的时态标志故选A。