A.while | B.whether | C.what | D.which |
A.As; whom | B.What; whom | C.It; whose | D.As; whose |
A.he explained | B.what explained | C.how he explained | D.why he explained |
A.For the fust time | B.At first |
C.It was the first time | D.The first time |
A.While | B.As | C.If | D.Since |
A.before | B.if | C.while | D.as |
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