Before using "this" pointer, we must first declare it.
举一反三
- It's the first Ford we (have) and I must say I'm very satisfied with it.
- Before _____, the machine must be checked. A: being used B: using it C: being used to D: using
- We should check the bill again before we pay for it.
- The _______ of life tells us that we must cherish it.
- We must answer the telephone by the first ring.