Question

The computer was invented in the 1940’s and ______ quite a lot ever since.

1. A.
   was changed
2. B.
   had changed
3. C.
   has been changed
4. D.
   will change

Answer 1

C
試題分析：考察時(shí)態(tài)。本題的關(guān)鍵在于后面的時(shí)間狀語ever since自從，該短語要和現(xiàn)在完成時(shí)連用。句意：電腦是20世紀(jì)40年代發(fā)明的，從那以后一句發(fā)生了很大的改變。故C正確。
考點(diǎn)：考察時(shí)態(tài)
點(diǎn)評(píng)：時(shí)態(tài)題的考查關(guān)鍵是抓住句子的上下文含義和句中的時(shí)間狀語。要根據(jù)時(shí)間狀語來選擇合適的時(shí)態(tài)，在平時(shí)的學(xué)習(xí)中要注意積累有關(guān)時(shí)態(tài)的用法和各種時(shí)態(tài)的特殊之處。如since， so far等經(jīng)常與現(xiàn)在完成時(shí)連用。在條件狀語從句中用一般現(xiàn)在時(shí)代替將來時(shí)等等。