Question

2. —Listen,they’re talking about their       again!

—Well,they hope it’ll prove their answer right.

   A. experiment   B. agreement

   C. development   D. environment

Answer 1

2. A

句意:——听，他们又在谈论他们的实验！——嗯，他们希望这能证明他们的答案是正确的。

experiment实验；agreement 协议； development 发展； environment 环境。由答语中 prove their answer righl可推知是实验。故选A。