Помогите правильно вставить:
1) The Earth ... round the Sun.
a) goes, b) was going, c) will go, d) has gone.
2) I ... my book on the desk a few minutes ago.
a) lay, b) have lain, c) laid, d) have laid.
3) There's nothing left for him but escape, ... ?
a) is it, b) isn't, c) is there, d) isn't there.