Answer Key
Pre-test
You have already passed this section on 2015-02-17 at 1:29 scoring 100%.
Choose the correct form of the verb...
- It's a secret, so you [mustn't] tell anyone, ok?
- It was difficult, but finally we [were able to] make the machine work again.
- Sorry I missed your call. I [must] have been in the shower.
- I'm not sure - I [may have been] there with my parents when I was a teenager.
- I [couldn't sleep] , so I drank a glass of warm milk.
- That was unnecessary! You [didn't have to] pay for it.
- Nobody [was allowed to] leave the room until the police arrived.
- It isn't that important - you [don't need to] do it right away.
- I don't know... that [might] not be a good idea!
- I feel awful - I [shouldn't] have eaten all those fried clams!