It was in 1969 ________ two Americans went to the moon by spaceship.
| A．when | B．that | C．at that time | D．just then |
The city of Xi'an in western China has announced its plans for the One Belt One Road program yesterday ________ include 60 projects with a total investment of more than 115 billion yuan.
| A．what | B．which | C．where | D．when |
It is reported that the number of tourists visiting Hong Kong this year is smaller than ________of last year.
| A．it | B．that | C．one | D．those |
Peter’s application for a visa was rejected because he didn’t follow the right ________.
| A．program | B．procedure | C．pattern | D．content |
Because Michael was walking in the dark alone, he sang to ________ his courage.
| A．hold up | B．take up |
| C．set up | D．keep up |
But for the fact that Mr Smith ________ill yesterday, he would have attended the important meeting.
| A．was | B．be | C．were | D．had been |