| Professor Nelson wants to know _______. |
A. when the concert will begin B. when will the concert begin C. when would the concert begin D. when the concert would begin |
| I ______ too late last night, so I am very tired now. |
A. called up B. set up C. stayed up D. showed up |
| — How many students are there in your class? — Our class made up of fifty students. |
A. has B. have C. is D. are |
| — ______ are you doing for your vacation? —I am spending time with my friends. |
A. What B. When C. Where D. Why |