roblem is said _______ three times, but he stillcan’t understand it.

uncertain ___ side effects theseweight-loss drugs will bring about, although hundreds of thousands of patientshave taken it.

She is so optimistic that her cheerful spirits and bubbling laughter _____ the whole class.

Hi, Tina, can I use your car for a while this afternoon?—– Sorry, _______

__________my great surprise, my parents allow me _________part in the outdoor activities.