It was the training _____ he had as a young man _____ made him such a good engineer.
What a pity! You missed the sightseeing, or we ________ a good time together.
had
will have
would have had
had had
________ the convenience of digital payment, many senior citizens started to use smart phones.
To enjoy
Enjoying
To have enjoyed
Enjoy
A few months after he had arrived in China, Mr. Smith ________ in love with the people and culture there.
would fall
had fallen
has fallen
fell
Unlike traditional gyms, app-backed gyms offer people ________ options to exercise.
casual
regular
flexible
tight
Favorable policies are ________ to encourage employees' professional development.
in effect
in command
in turn
in shape