(51) “Did they find the missing keys?” they wondered.
- (a) They wondered if they find the missing keys.
- (b) They wondered if they have found the missing keys.
- (c) They wondered if they had found the missing keys.
- (d) They wondered if they finding the missing keys.
(52) “Will he buy a new car?” she asked.
- (a) She asked if he will buy a new car.
- (b) She asked if he buy a new car.
- (c) She asked if he would buy a new car.
- (d) She asked if he buying a new car.