If the new arrangement doesn’t _____, we’ll go back to the old one.
| A．work over | B．work out | C．work up | D．work in |
The twins ___ closely in appearance，but are totally different in character．
| A．resemble | B．distinguish |
| C．look | D．1ike |
The students in our school are encouraged to involve themselves in group activities，whether in or after class，______ they can develop their team spirit.
| A．when | B．which | C．that | D．where |
His brother , who____ in the army for five years，is now running a farm in our village
| A．serves | B．served |
| C．had served | D．has served |
The Ministry of Public Security has recently started a nationwide ____speeding，overloading and running red lights.
| A．celebration | B．conference |
| C．campaign | D．ceremony |
A selfie stick is_____ enables users to position their smartphones to get better photo angles
| A．that | B．how | C．what | D．who |