I. Choose the best answer : 1. The weather .................. nice yesterday. a. is b. was c. will be d. has been 2. It's difficult ................ your direction. a. to follow b. following c. to following d. followed 3. Would you mind .............. in the front of the Taxi, Mark? a. sit b. to sit c, sitting d. siting 4. The boy ................. over there is my brother. a. stand b. stood c. standing d. being stood 5. I was cooking for dinner ......................................... a. Then the phone rang b. then the phone was ringing c. When the phone rang d. when the phone was ringing.