If you are traveling ________ the customs are really foreign to your own, please do as the Romans do．

in which

what

when

where

________ you’ve tried it, you can’t imagine how pleasant it is．

Unless

Because

Although

When

I do every single bit of housework ________ my husband Bob just does the dishes now and then．

since

while

when

as

We were told that we should follow the main road ________ we reached the central railway station．

whenever

until

while

wherever

You should try to get a good night’s sleep ________ much work you have to do．

however

no mater

although

whatever

________ I accept that he is not perfect, I do actually like the person．

Though

Since

Before

Unless

________ modeling business is by no means easy to get into, the good model will always be in demand．

Because

Whether

When

Where

Scientists say it may be five or six years ________ it is possible to test this medicine on human patients．

since

after

before

when

You can eat food free in my restaurant ________ you like．

whenever

wherever

whatever

however

Parents should take seriously their children’s requests for sunglasses ________ eye protection is necessary in sunny weather．

because

though

unless

if