28) I suddenly remembered that I (forget) …………………….. my keys.
29) While Diana (watch) …………… her favourite TV programme, there (be) ………….. a power cut.
30) Who (drive) …………………….. the car at the time of the accident?
31) By the time Sheila (get) ……………… back, Chris (go) …………………….. home.
32) David (eat) ………………… Japanese food before, so he (know) ……………………… what to order.
33) I (do) …………………….. some shopping yesterday, when I (see) …………………….. your friend.
34) What ………. you (do)…………………. when I (come) ……………………… to your office yesterday?
35) Laura (miss) …………………….. the party because no one (tell) …………………………. her about it.