(When / During) ... I was going to school, I saw an owl in the tree.
When
Susan heard some strange noise ... (while / after) she was doing her home-work.
while
We often play football ... (by / after) school.
after
(Until / Before) ... you start the experiment, you have to put on protective goggles.
Before
(As soon as / While) ... you know your exam results, please tell me.
As soon as
We are going to work with grammar ... (while / during) the next week.
during
Please don't open the box ... (till / as soon as) your birthday.
till
Don't leave the house ... (during / until) mum comes.
until
(When / By the time) ... the film starts, I finish the washing-up.
By the time
Tom stopped reading ... (by / as soon as) 9 pm and at 9:01 he already fell asleep.
by
... Rob was gardening, his dog was running and catching butterflies.
While
I always wash my hands ... I eat.
before
... you know the answer, quickly push the button!
As soon as
I don't usually do anything special ... my holidays. I just lie at the swimming pool and relax.
during
