That is __________ the problem lies.
David stayed inside himself, ______ to be alone, or in a corner of the cabin.
Come ____ quickly. The plane will take off in 10 minutes.
– When can I get the ticket for the opening ceremony? -- Don’t worry. You ____ get one this very afternoon.
Allow children space to voice their opinions _____ they are different from yours.
I will not wait for him for a second – he may have something else to do, so he could not _____ here.