1.   Legally, the government was obliged to maintain strong control of transport, making privatisation problematic.

2.   Now the Delhi fly has made problematic the anticipated rise in tax revenue.

3.   Sadler said Sierra Nevada bighorn sheep live in a harsh alpine environment that makes survival problematic under any circumstance.

4.   So even shows made problematic by the recent tragedy appeared as originally intended.

5.   So is traffic congestion, making deliveries problematic.

6.   That makes compromise problematic, to say the least.

7.   The gulf between the White House and the Republican-led Congress over the budget is spectacularly wide, making it problematic that negotiations could succeed.

8.   The snow, which began a couple of hours before the game and lasted all evening, made everything problematic.

9.   Identifying those who perished was made problematic because rescue workers looted wallets and other identification from the bodies.