With the development of science and technology，there is no doubt ________ Chinese astronauts will land on the moon in the near future.

We often plant _______trees every year.

They go to work early on workdays Saturday and Sunday. [ ]

Our holiday in Beijing cost a lot of money.—Did it? Well, that doesn’t matter ______ you enjoyed yourselves

We are glad to hear that the Greens __________ to a new flat next week.