农场主用拖车把干草运到谷仓。

The farmer used a ___trailer to transport the hay to the barn.

我们在电影院看了这部新片的前导预告片。

We watched the ___trailers for the new film at the cinema.

他们把房车停在湖边过周末。

They parked their ___trailer by the lake for the weekend.