Do you know _______he came?—I am not sure. Maybe for the toy car.

What are you doing, John? Why stop?—To be on the safe side, we’d fill up the car now for we _______ run out of gas on the way．

Move the plants to a south-facing window, ________they can absorb daytime heat.

下列句子中，没有语病的一项是（ ）

I can hardly hear what it is saying on the radio.Would you please ________