Form sentence using all the given words (i) must / at five o'clock / leave / we / the house
(ii) the library / take / 1 / the book / will / today / to
(iii) my mum / breakfast / in the morning / made
(iv) tonight / want / to the cinema / to go / we (v) wrote / last week / they / at school / a test

i) we must leave the house at 5 o'clock

ii) we will take the book to the library at 1 o'clock today

iii) my mum made breakfast in the morning

iv) we want to go to the cinema tonight

v) they wrote a test last week at school

Explanation:

you have to rearrange the words and when you can't do that use your creativity while still using the words given.

The correct answer is b-The oven had been smoking.

Explanation: The past perfect progressive tense basically looks at an incident that started in the past and ends in the past. The key words to look for are "had been." Other words usually that follow "had been" are "when, before, for" and "since" in the past perfect progressive tense.