--- Hi, Grandma, why do you look so tired?
--- I’m tired. I _______ the cleaning all morning.
| A．did | B．had done | C．have been doing | D．have done |
Dorothy was always speaking highly of her role in the play, ____, of course, made the others unhappy.
| A．who | B．which | C．this | D．what |
He made another wonderful discovery, ______ of great importance to science.
| A．which I think is | B．which I think it is | C．which I think it | D．I think is |
He’s got himself into a dangerous situation _____ he is likely to lose control over the plane.
| A．where | B．which | C．while | D．why |
I met the teacher in the street yesterday ________ taught me English three years ago.
| A．which | B．when | C．where | D．who |
Is this all that you need？ If you married me, I’d give you everything you _____.
| A．want | B．wanted | C．had wanted | D．are wanting |