你想说，这是一支钢笔，你可以说（）

是

否

A、It's a sunny day

B、It's a good day

C、It's Sunday

A、They’re so big

B、They’re so long

C、They’re so small

A、It's time to dinner

B、It's time for lunch

C、It's time for dinner

A、What's thisIt's a flower

B、What a beautiful flower

C、What a big flower

是

否

A、olphins are quicker than sharks

B、olphins are longer than sharks

C、olphins are bigger than sharks

A、He is throwing food at animals

B、He does't throw food at animals

C、He mustn't throw food at animals

A、看，飞来了一只鸟。（主谓句）

B、我拾到一支钢笔。（主谓句）

C、天降大任于你。（非主谓句）

D、京剧是国粹之一。（非主谓句）

是

否

是

否