All the students in my class can’t ______ the math problem. It’s too difficult for us.
A. work on B. work out C. work for
相关试题
She lives _______, but she doesn’t feel _______.
| A．alone; lonely | B．alone; alone |
| C．lonely; lonely | D．lonely; alone |
_______ children in Africa have little food to eat, and we can help them.
| A．Million | B．A millions | C．Millions of | D．Millions |
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