When a storm is just ________, we must fix up the roof to prevent it from________.[ ]

Will you lend your MP4 player to Jack?– Yes, ________ he promises to return it on time

－Are you sure you have to It’s been very late.－I don’t know ________ I can do it if not now.

My brother used to _______ up late, but now he is used to _______ up early.

Her parents insisted that she ________ a clever student and ________ a better education.