1. A You must wash this sweather in warm water ( CT: S + Must + Vinf+...)
2. B It's the first time I've ever seen this style of jeans ( CÔNG THỨC: t/this/S + is/was + The first time + (that) + S + have/has + Verb (PP))
3. A It took secretary half an hour to write the report (CT: takes/ took (sb) + time + to V)
4. C Some flowers were being planted by Farmer Lum when we came (CT: S+were/was+V2/ed+By O+...)
5. B When did you start working as a designer? )(When did + S + start/begin + V-ing to V?)
xin hay nhất ạ
