_____more countries can use natural energy in the future remains to be seen.
My sister met him at Ningbo Grand Theatre yesterday afternoon, so he your lecture.
---Did they have a good time at the party? ---Judging by their smiles, they _________ have enjoyed themselves.
That little boy can pick up a tune immediately on the violin; he really has a _____for music.
----Has Mr lee arrived? ---No, but it is already 9 o’clock. He should ____at any time.
Maria looked around on the playground _______ looking for something.