Itwas()whofirstintroducedandreformedtheE...fWilliamShakespeare.

Itwas1969___theAmericanastronautssucceededinlandingonthemoon.（） A: which B: that C: onwhich D: when

Itwas1969___theAmericanastronautssucceededinlandingonthemoon． A: that B: when C: onwhich D: which

Notonly______difficulttolight,butitsmelledofoil. A: wasit B: itmade C: diditmade D: itwas

我国第一条地铁线路于（）建成。 A: 1969北京 B: 1969广州 C: 1969上海 D: 1976北京

<spanstyle="text-decoration:underline;">Itwas</span>about600yearsago<spanstyle="text-decoration:underline;">when</span>thefirstclock<spanstyle="text-decoration:underline;">with</span>afaceand<spanstyle="text-decoration:underline;">anhourhand</span>wasmade. A: Itwas B: when C: with D: anhourhand

正是经过彻底检查后，他们才发现故障所在。(Itwas…that)

中国大学MOOC: Itwas not until 1919 when Peace Conferencewas held, a largenumber of interpreters were hired.

____the 1500s ____ the first Europeans explored the coast of A: It was not until…when B: It is until…that C: It was not until…that D: Itwas until…then

Thefirstrecordeduseofnaturalgastolightstreetlamps<spanstyle="text-decoration:underline">itwas</span>inthetownofFrederick,NewYork,in1825. A: was B: is C: itis D: were