28．I had wanted to help you last night but I couldn't spare any time．for I_____an essay that is due this morning．
| A．wrote | B．had written | C．was writing | D．have written |
When they went into the shop and asked to look at the engagement rings, the girl brought out a cheaper one, _______ she had arranged with James.
| A．the which was what | B．what was that | C．which was what | D．that was that |
The famous basketballer, _______ tried to make a comeback, attracted a lot of attention.
| A．where | B．when | C．which | D．who |
I saw some trees the leaves of _____ were black with disease.
| A．that | B．which | C．it | D．what |
Their problem today is somewhat similar to _____ they faced many years ago.
| A．that | B．which | C．that which | D．it |
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 |