---The current international financial crisis is affecting most countries in the world.

---Would it be at least several years ____ everything returns to normal?

---The current international financial crisis is affecting most countries in the world.

  ---Would it be at least several years ____ everything returns to normal?

A. when              B. that               C. since              D. before

— The current international financial crisis is affecting most countries in the world.

— Would it be at least several years ______ everything returns to normal?

A. when                       B. that                    C. since                      D. before

---The current international financial crisis is affecting most countries in the world.
---Would it be at least several years ____ everything returns to normal?

---The current international financial crisis is affecting most countries in the world．

---Would it be at least several years ____ everything returns to normal?

A．when          B．that           C．since          D．before