How long ________ they ________ (dig) the ditch?
have … been digging
暂无解析
He ________ me that he decided to leave on Monday.
________(catch)intherain,hewaswettotheskin.
He refused to tell us whether he ________ (undertake) the job.
Comrade Li ________ be in Beijing because I saw him in town only a few minutes ago.
he teacher told them since light ________ (travel) faster than sound,lightning ________ (appear) to go before thunder.
