Possibly the greatest advance in ____materials
came with the invention of a cheap way to make steel.
A: bridge-building
B: building of bridges
C: building a bridge
D: bridges are built
came with the invention of a cheap way to make steel.
A: bridge-building
B: building of bridges
C: building a bridge
D: bridges are built
举一反三
- 8.The iron-steel bridge _______ now. A: is being built B: is building C: builds D: was building
- They ______________ (build) that bridge for over a year and it still isn’t finished. A: build B: built C: are building D: have been building
- The bridge ______ over there is to be completed next May. A: built B: being built C: building D: having built
- What are the two types of bridges in ancient China according to their structural forms? A: Flat bridges and covered bridges B: Beam bridges and covered bridges C: Arch Bridge and Flat Bridge D: Beam bridges and arch bridges
- ____ building the bridges, the areas on both sides of the river developed rapidly.