____ beautiful flowers!

It’s reported that Nanjing Metro Line 3 was in service __________ April 1,2015.—What _________ exciting news! I believe the public transport system of Nanjing will be much better.

________ it is from our own planet Earth to Mars!— Yes, it takes months to travel to Mars by spacecraft.

Many Chinese universities provide scholarships for students ________ financial aid.[ ]

The last time we had great fun was ________ we were visiting the Water Park