I learn ___ my cost that a broken leg can be very painful.

He has broken his leg and ____ he can’t walk.

It can be inferred from the last paragraph that______.A．planting trees can be very helpful

It can be inferred from the last paragraph that______.A．very few artists can be good busin

It can be inferred from the third paragraph that______.A．it is costly for a company to mak

Speaker A: Can I use your pen？ Mine is broken. Speaker B: I guess I have one on my desk.__

A______in the leg can be very serious in old people.A．fractureB．fragmentC．fixtureD．frictio