His ability has never been in doubt----the question is ___________ or not he is prepared to work hard.
I waited for her at the bus station for two hours, but she never______.
Scientists have created GM tomatoes which ______ fresh for 45 days, three times as long as normal tomatoes.
It is not until we know more about the situation ______ we are able to improve it.
— I hear that Mary is ______ to stay with us for a few days. —That’s great.
It was between 1830 and 1835 ______ the modern newspaper was born. A how B that C which D because