—Mum, can I help you make dumplings?—Sure, honey! ________ the meat and cabbages first, please.
-Could you tell me________ yesterday? -I went bike riding with my classmates.
The police warned the thief _______again.
I wonder_____ they will pass the exams or not.
The light______ by Edison is helpful for people.
—________do you practice your pronunciation? —I practice it _____ asking the teacher for help.