They are determined to work out the task,____difficult it is.
| A．however | B．no matter what | C．no matter what | D．whatever |
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____ abroad for two years, the two astronauts went back home last year.
| A．Educating | B．Educated | C．Having been educated | D．being educated |
________ the normal condition, he can read 150 words a minute.
| A．Below | B．Under | C．With | D．In |
He left ________any of his friends _________ him _________.
| A．with; seeing; of | B．without; seeing; off |
| C．without; see; / | D．with; see; out |
________ the normal condition, he can read 150 words a minute.
| A．Below | B．Under | C．With | D．In |
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