题目

When solving the problem a second time, you’d better be more careful ________ you made a mistake.     A. in case              B. where        C. in which      D. that 答案：B 单句改错。 (     )1. I want to know if Chinese is spoken by Canada.                               A             B                  C         D(     )2.John was late for school. The reason was because he missed the bus.                     A           B                                          C             D(     )3.Even though English is difficult to learn, but you should keep learning it.                                                             A        B                       C     D(     )4.About 400 millions of people speak English as their first language all over the world.                                     A                                       B            C                    D                                        (     )5.Many foreigners find that difficult to learn Chinese well.                               A         B     C                 D __________________ _________  __________________