题文
–We’ve decided _______ on a trip this afternoon. Will you join us?
-- I’m afraid not. I have some problems ___________ out.
| A．to go, to work | B．to go , working |
| C．going. to work | D．doing, working |
–We’ve decided _______ on a trip this afternoon. Will you join us?
-- I’m afraid not. I have some problems ___________ out.
| A．to go, to work | B．to go , working |
| C．going. to work | D．doing, working |
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