The teachers asked the students A if they were interested in dinosaurs B how many trees they haveplanted

The teachers asked the students A if they were interested in dinosaurs B how many trees they haveplanted
The teachers asked the students A if they were interested in dinosaurs B how many trees they have
planted

The teachers asked the students A if they were interested in dinosaurs B how many trees they haveplanted
正解是A
考察宾语从句, 主句过去时,从句用过去时某种形式.