1. --- Where did you find ______ pen you lost yesterday?

--- Under_______ table beside the window.

  A. the, a                     B. the, the               C. /, the                  D. the, /

2. --- There is coffee and tea, you can have ______.

  --- Thanks.

  A. either                       B. each                        C. one                       D. it

3. Don’t be afraid of asking for help ______ it is needed.

  A. unless                      B. since                       C. although                D. when

4. ______ exciting sport it is to climb the mountains!

  A. How                        B. What                       C. What a                  D. What an