Make sure you’ve got the passports and tickets and _______ before you leave.
—I’m going to play soccer now. —________. It’s raining heavily outside.
No one has yet succeeded in solving the _____ of how life first began.
Can you tell me ______?
—She looks very happy. She ______ have passed the exam. --I guess so. It’s not difficult after all.
Mary,along with her parents,______to Paris.