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It was only when I reread his poems recently _______ I began to appreciate their beauty.
| A．until | B．when | C．that | D．after |
The children,____ had played the whole day long, were worn out.
| A．all of what | B．all of which | C．all of them | D．all of whom |
The museum will open in the spring with an exhibition and a viewing platform____ visitors can watch the big glasshouses being built.
| A．what | B．where | C．when | D．why |
（2013·新课标Ⅱ卷)When I arrived, Bryan took me to see the house_ I would be staying.
| A．what | B．when | C．where | D．Which |
He wrote a letter ________ he explained what had happened in the accident.
| A．what | B．which |
| C．where | D．how |
The days are gone______physical strength was all you needed to make a living.
| A．when | B．that |
| C．where | D．which |